FullMetalJackass99 tells us more.

Here's the Follow Up: After my father died, I had forgotten to delete his number (As many have) and the scammers tend to use fake numbers made up of similar numbers to my own. Dad and I had the same first 5 numbers. It was only a matter of time. Oh, it gets better: It happened again TO MY MOTHER whose number is separated by only a single digit.